The groom's maternal aunt, Queen Margrethe II of Denmark, wore pearl and diamond earrings, plus an interesting necklace. She gathered up her pearls with a sapphire cabochon and diamond fleur-de-lis brooch.

Chris Jackson/Getty Images

Here's a better look at the brooch, which is reportedly a family heirloom, previously worn by Queen Ingrid.

Pascal Le Segretain/Getty Images

In this view, also note Margrethe's diamond engagement ring on her left hand; the enormous "toi et moi" ring was made by Van Cleef and Arpels. (More about it over here!)

She also wore an elaborate cuff bracelet on her right wrist. (You'll note two other things here: Mary was accompanied by Crown Prince Haakon of Norway, as neither of their spouses could attend, and she's pregnant with her twins, Prince Vincent and Princess Josephine.)

And here's another look at the necklace, which features a monograph and the word "Fevrier" (which translates to "February").

Pascal Le Segretain/Getty Images

The Danish contingent was rounded out by the Sayn-Wittgenstein-Berleburg branch of the family. Princess Alexandra attended with her husband, Jefferson, and their son, Richard.

Pascal Le Segretain/Getty Images

You get a decent look at Alexandra's earrings here; behind her, you can also see the cluster earrings worn by Carina Axelsson, partner of Alexandra's brother, Prince Gustav.

Pascal Le Segretain/Getty Images

Queen Maxima of the Netherlands brought along a pair of family heirloom earrings. These openwork diamond earrings, worn here with aquamarine briolette drops, belonged to her husband's grandmother, Queen Juliana. (Read about Juliana's aquamarine collection over here!)

Pascal Le Segretain/Getty Images

Maxima also wore her own diamond wedding bracelet on her left wrist.

Pascal Le Segretain/Getty Images

Only a few weeks after their own wedding, Crown Princess Victoria and Prince Daniel of Sweden headed to Greece for the wedding of her second cousin.

Chris Jackson/Getty Images

She wore a fun pair of earrings set with pearls and colorful, semi-precious gemstones.